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Fractal dimension of Li insertion electrodes studied by diffusion-controlled voltammetry and impedance spectroscopy
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.ORCID iD: 0000-0002-5496-9664
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.ORCID iD: 0000-0002-8279-5163
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.
1996 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 54, no 5, 2968-2971 p.Article in journal (Refereed) Published
Abstract [en]

We show that a unique fractal dimension can be obtained for Li insertion electrodes by applying two different electrochemical methods to samples of porous Sn oxide and Ti oxide. The first method relies on the assumption that the current recorded in voltammetric experiments, conducted in a Li containing electrolyte, is limited by Li diffusion from the fractal working electrode surface into the oxide matrix. The second method is based on the capacitance dispersion observed in impedance spectroscopy. Simple scaling arguments show that this capacitance dispersion is related to the fractal structure of surface roughness

Place, publisher, year, edition, pages
1996. Vol. 54, no 5, 2968-2971 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-29747DOI: 10.1103/PhysRevB.54.2968PubMedID: 9986176OAI: oai:DiVA.org:uu-29747DiVA: diva2:57643
Available from: 2008-10-17 Created: 2008-10-17 Last updated: 2017-12-07Bibliographically approved

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Strömme, MariaNiklasson, Gunnar A.Granqvist, Claes-Göran

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